马来酸

Maleic acid is used as a precursor to fumaric acid, dimethyl maleate and glyoxalic acid. It is an electrophile and acts as dienophine in Diels-Alder reactions. It reacts with drugs to form more stable addition salts like indacaterol maleate, carfenazine, chlorpheniramine, pyrilamine, methylergonovine and thiethylperazine. Its maleate ion is useful in biochemistry as an inhibitor of transaminase reactions.

Incompatible with oxidizing agents, bases, reducing agents, metals and alkalis.

MFCD00063177

203-742-5

C₄H₄O₄

116.07

132-136°

127°(260°F)

1.59

Ambient temperatures.

Crystalline powder

Soluble in water, acetone, glacial acetic acid, alcohol and concentrated sulfuric acid. Slightly soluble in diethyl ether. Insoluble in benzene and chloroform.

605762

14,5703

II

22-36/37/38-43
Harmful if swallowed.Irritating to eyes, respiratory system and skin.May cause sensitization by skin contact.

8

24-26-28-37-46
Avoid contact with skin.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).If swallowed, seek medical advice immediately and show this container or label.

OM9625000

 

是

 

H302-H315-H319-H317-H335
Harmful if swallowed.Causes skin irritation.Causes serious eye irritation.May cause an allergic skin reaction.May cause respiratory irritation.

P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray.Wear protective gloves and eye/face protection.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing.Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.